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WorksheetsPhysical World and Measurement
Total questions: 30
Worksheet time: 19mins
How many numbers of base SI units are there?
5
7
9
10
Identify the physical parameters that are having the same dimensions from the below-given list:
(i) Magnetic field
(ii) Energy density
(iii) Refractive index
(iv) Young’s modulus
(v) Dielectric constant
(ii) and (iv)
(i) and (v)
(iii) and (iv)
(iv) and (iii)
Calculate the value of the dot product of the two vectors whose magnitudes are 3 units and 4 units and their resultant is 1 unit.
0
-1 unit
+6 units
-12 units
What is the percentage error in the measurement of the kinetic energy of a body, if there is a positive error of 50% in the speed of the body
125%
100%
30%
50%
Which the following is a dimensionless quantity
Refractive index
Velocity
Planck’s constant
Gravitational constant
Following are the readings obtained while measuring the diameter of a wire by using the screw gauge0 mm is the main scale reading
52 divisions are the circular scale reading
What is the diameter of the wire if 1 mm on the main scale is equal to the 100 divisions on the circular scale
0.016 cm
0.052 cm
0.15 cm
0.05 cm
What is the dimensional formula of torque and energy
[ML−3T−2]and[MLT−2]
[ML2T−2]and[MLT−2]
[ML2T−2]and[ML2T2]
[MLT2]and[ML2T2]
Find the relative error of y, if y=x2
x△x
x2△x
x(△x)2
(△x)2
From the given three fundamental constants, select the combination that gives the dimension of length
(i) Newton’s gravitational constant (G)
(ii) Speed of light in a vacuum (c)
(iii) Planck’s constant (h)
Ghc
h23Gc
C25hG
c23hG
The word Science originates from the Latin verb Scientia meaning
to experience
to know
to see
to observe
Atomic and molecular phenomena are dealt with by
Newtonian Mechanics
fluid Mechanics
applied Mechanics
Quantum Mechanics
Wave picture of light failed to explain.
the photoelectric effect
polarization of light
diffraction of light
interference of light
Heliocentric theory proposed by Nicolas Copernicus was
replaced by circular orbits to fit the data better
replaced by elliptical orbits to fit the data better
replaced by elliptical orbits to fit the taste of new rulers of Italy
replaced by parabolic orbits to fit the data better
ust as a new experiment may suggest an alternative theoretical model, a theoretical advance may suggest what to look for in some for in some experiments. Which of the following experiments can be considered to support this claim?
Davisson and Germer Experiment
Michelson Morley experiment
experimental discovery of positron
scattering of alpha particle or the gold foil experiment
The scientific method is
a prescribed method for investigating phenomena, acquiring new knowledge…
A procedure for proposing new hypothesis
a body of techniques for investigating phenomena, acquiring new knowledge…
A method for proposing new theories.
A scientific theory
cannot be changed but can be reformulated
is fixed once and for all because it is logical
is changed to suit new fashion among scientists
can be revised if required to fit new phenomenon or data
Which of the following is a possible first step in applying the scientific method
Conducting tests
Formulating a hypothesis
Formulation of a question
Building a theory
Which of the following is a possible final step in applying the scientific method
Formulating a hypothesis
Building a theory
Analysis of test results
Formulation of a question
Physics is a
Applied Science
Natural Science
Mathematical Science
Engineering Science
Newtonian mechanics could not explain
fall of bodies on earth
Some of the most basic features of atomic phenomena.
movement of planets
flight of rockets
The volume of a cube of side 1 cm is equal to……… m3
(a)
The surface area of solid cylinder of radius 2.0 cm and height 10.0 cm is equal to……. (mm)2.
(a)
A vehicle moving with a speed of 18 km h-1 covers………… m in 1 s.
(a)
The relative density of lead is 11.3. Its density is…….. g cm-3 or…………. kg m-3.
(a)
1 kg m2 s-2 = …………. g cm2 s–2
(a)
1 m =……………. ly
(a)
3 m s-2 = ………. km h–2
(a)
G = 6.67 x 10-11 N m2 (kg)–2 =……………. (cm)3 s–2 g1.
(a)
A new unit of length is chosen such that the speed of light in a vacuum is unity. What is the distance between the Sun and the Earth in terms of the new unit if light takes 8 min and 20 s to cover this distance?
500 new units
160 new units
1000 new units
750 new units
A student measures the thickness of a human hair by looking at it through a microscope of magnification 100. He makes 20 observations and, finds that the average width of the hair in the field of view of the microscope is 3.5 mm. What is the estimate of the thickness of the hair?
0.07 mm
0.025 mm
0.035 mm
0.0035 mm
